// Press Shift twice to open the Search Everywhere dialog and type `show whitespaces`,
// then press Enter. You can now see whitespace characters in your code.
public class Main {
    public static void main(String[] args) {
        Animal animal_1 = new Cat("cat");
        Animal animal_2 = new Dog("Dog");
        animal_1.Bark();

        animal_2.Bark();
    }
}